SEI Investments Company
MX ˙ BMV ˙ US7841171033
SecurityMX:SEIC / SEI Investments Company
InstitutionAmeriprise Financial Inc
Latest Disclosed Ownership869,549 shares
Latest Disclosed Value $ 68,235,990
Ameriprise Financial Inc reports 5.85% increase in ownership of SEIC / SEI Investments Company

On May 15, 2026 - Ameriprise Financial Inc filed a 13F-HR form disclosing ownership of 869,549 shares of SEI Investments Company (MX:SEIC) valued at $68,235,990 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 821,461 shares of SEI Investments Company. This represents a change in shares of 5.85% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F SEI INVESTMENTS COM 784117103 869,549 48,088 5.85 68,236 1.27 0.0029
2026-02-17 2025-12-31 13F SEI INVESTMENTS COM 784117103 821,461 5,767 0.71 67,378 -2.64 0.0152
2025-11-14 2025-09-30 13F SEI INVESTMENTS COM 784117103 815,694 221,033 37.17 69,206 29.52 0.0159
2025-08-14 2025-06-30 13F SEI INVESTMENTS COM 784117103 594,661 96,573 19.39 53,434 38.19 0.0132
2025-05-14 2025-03-31 13F SEI INVESTMENTS COM 784117103 498,088 22,296 4.69 38,666 -1.48 0.0104
2025-02-14 2024-12-31 13F SEI INVESTMENTS COM 784117103 475,792 93,568 24.48 39,246 48.40 0.0101
2024-11-14 2024-09-30 13F SEI INVESTMENTS COM 784117103 382,224 -22,848 -5.64 26,446 0.92 0.0068
2024-08-14 2024-06-30 13F SEI INVESTMENTS COM 784117103 405,072 27,973 7.42 26,204 -3.35 0.0071
2024-05-15 2024-03-31 13F SEI INVESTMENTS COM 784117103 377,099 -18,595 -4.70 27,113 7.81 0.0075
2024-02-14 2023-12-31 13F SEI INVESTMENTS COM 784117103 395,694 -201,654 -33.76 25,149 -30.10 0.0075
2023-11-14 2023-09-30 13F SEI INVESTMENTS COM 784117103 597,348 -27,636 -4.42 35,978 -3.44 0.0118
2023-08-14 2023-06-30 13F SEI INVESTMENTS COM 784117103 624,984 -45,978 -6.85 37,262 -3.51 0.0117
2023-05-22 2023-03-31 13F/A-1 SEI INVESTMENTS COM 784117103 670,962 139,816 26.32 38,616 24.69 0.0127
2023-05-15 2023-03-31 13F SBA COMMUNICATIONS COM 784117103 670,962 139,816 38,616 0.0023
2023-02-14 2022-12-31 13F SEI INVESTMENTS COM 784117103 531,146 -75,836 -12.49 30,969 3.15 0.0106
2022-11-14 2022-09-30 13F SEI INVESTMENTS COM 784117103 606,982 -60,936 -9.12 30,024 -16.78 0.0111
2022-08-15 2022-06-30 13F SEI INVESTMENTS COM 784117103 667,918 -437,423 -39.57 36,080 -45.69 0.0126
2022-05-16 2022-03-31 13F SEI INVESTMENTS COM 784117103 1,105,341 42,107 3.96 66,436 2.56 0.0196
2022-02-14 2021-12-31 13F SEI INVESTMENTS COM 784117103 1,063,234 -30,847 -2.82 64,780 -0.09 0.0179
2021-11-15 2021-09-30 13F SEI INVESTMENTS COM 784117103 1,094,081 -133,413 -10.87 64,836 -14.76 0.0207
2021-08-16 2021-06-30 13F SEI INVESTMENTS COM 784117103 1,227,494 30,933 2.59 76,064 4.33 0.0235
2021-05-17 2021-03-31 13F SEI INVESTMENTS COM 784117103 1,196,561 -24,576 -2.01 72,904 3.88 0.0242
2021-02-12 2020-12-31 13F SEI INVESTMENTS COM 784117103 1,221,137 -104,197 -7.86 70,183 4.40 0.0249
2020-11-16 2020-09-30 13F SEI INVESTMENTS COM 784117103 1,325,334 -40,593 -2.97 67,222 -10.49 0.0273
2020-08-14 2020-06-30 13F SEI INVESTMENTS COM 784117103 1,365,927 -7,710 -0.56 75,100 17.98 0.0322
2020-05-15 2020-03-31 13F SEI INVESTMENTS COM 784117103 1,373,637 -230,416 -14.36 63,653 -39.40 0.0334
2020-02-14 2019-12-31 13F SEI INVESTMENTS COM 784117103 1,604,053 -94,103 -5.54 105,038 4.39 0.0437
2019-11-14 2019-09-30 13F SEI INVESTMENTS COM 784117103 1,698,156 -32,466 -1.88 100,617 3.63 0.0451
2019-08-14 2019-06-30 13F SEI INVESTMENTS COM 784117103 1,730,622 4,897 0.28 97,090 7.68 0.0435
2019-05-15 2019-03-31 13F SEI INVESTMENTS COM 784117103 1,725,725 -29,577 -1.69 90,169 11.18 0.0415
2019-02-14 2018-12-31 13F SEI INVESTMENTS COM 784117103 1,755,302 48,179 2.82 81,102 -22.24 0.0406
2018-11-14 2018-09-30 13F SEI INVESTMENTS COMP COM 784117103 1,707,123 -86,753 -4.84 104,304 -7.00 0.0365
2018-08-14 2018-06-30 13F SEI INVESTMENTS COM 784117103 1,793,876 96,713 5.70 112,153 -11.79 0.0496
2018-05-14 2018-03-31 13F SEI INVESTMENTS COM 784117103 1,697,163 -102,552 -5.70 127,137 -1.70 0.0575
2018-02-12 2017-12-31 13F SEI INVESTMENTS COM 784117103 1,799,715 -74,719 -3.99 129,335 13.00 0.0590
2017-11-07 2017-09-30 13F SEI INVESTMENTS COM 784117103 1,874,434 -1,819 -0.10 114,453 13.43 0.0545
2017-08-10 2017-06-30 13F SEI INVESTMENTS COM 784117103 1,876,253 -246,057 -11.59 100,905 -5.74 0.0505
2017-05-05 2017-03-31 13F SEI INVESTMENTS COM 784117103 2,122,310 -330,873 -13.49 107,050 -11.60 0.0554
2017-02-03 2016-12-31 13F SEI INVESTMENTS COM 784117103 2,453,183 -178,429 -6.78 121,093 0.89 0.0661
2016-11-08 2016-09-30 13F SEI INVESTMENTS COM 784117103 2,631,612 -87,404 -3.21 120,029 -8.24 0.0672
2016-08-08 2016-06-30 13F SEI INVESTMENTS COM 784117103 2,719,016 76,272 2.89 130,812 14.98 0.0767
2016-05-12 2016-03-31 13F SEI INVESTMENTS COM 784117103 2,642,744 102,142 4.02 113,772 -14.55 0.0679
2016-02-11 2015-12-31 13F SEI INVESTMENTS COM 784117103 2,540,602 137,868 5.74 133,138 14.89 0.0782
2015-11-12 2015-09-30 13F SEI INVESTMENTS COM 784117103 2,402,734 -56,326 -2.29 115,882 -3.89 0.0718
2015-08-13 2015-06-30 13F SEI INVESTMENTS COM 784117103 2,459,060 652,829 36.14 120,567 51.40 0.0686
2015-05-14 2015-03-31 13F SEI INVESTMENTS COM 784117103 1,806,231 4,179 0.23 79,636 10.36 0.0457
2015-02-13 2014-12-31 13F SEI INVESTMENTS COM 784117103 1,802,052 6,429 0.36 72,160 11.13 0.0421
2014-11-14 2014-09-30 13F SEI INVESTMENTS COM 784117103 1,795,623 -49,017 -2.66 64,931 7.41 0.0391
2014-08-13 2014-06-30 13F SEI INVESTMENTS COM 784117103 1,844,640 69,058 3.89 60,449 1.29 0.0357
2014-05-14 2014-03-31 13F SEI INVESTMENTS COM 784117103 1,775,582 1,028,856 137.78 59,677 130.05 0.0358
2014-02-14 2013-12-31 13F SEI INVESTMENTS COM 784117103 746,726 24,119 3.34 25,941 16.13 0.0157
2013-11-14 2013-09-30 13F SEI INVESTMENTS COM 784117103 722,607 45,001 6.64 22,337 15.95 0.0147
2013-08-14 2013-06-30 13F SEI INVESTMENTS COM 784117103 677,606 677,606 19,265 0.0133
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.